Date: Tue, 21 Jan 2003 10:48:13 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: Dag-Erling Smorgrav <des@ofug.org> Cc: fs@freebsd.org Subject: Re: RAID alternatives Message-ID: <Pine.BSF.4.21.0301211042070.49285-100000@InterJet.elischer.org> In-Reply-To: <xzp4r82y1ol.fsf@flood.ping.uio.no>
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On Tue, 21 Jan 2003, Dag-Erling Smorgrav wrote: > I'm planning a new system to replace my aging 350 MHz K6-2, and am > considering various options for increasing disk performance and > reliability. I'm thinking of running RAID level 5 across three or > four identical IDE disks. The question is what RAID solution to pick: [...] > - Hardware RAID (more expensive, but less hassle and possibly higher > performance). The problem here is that IDE RAID controllers don't > seem to support RAID 4 or 5; they only support RAID 0, which is > pointless on its own; RAID 1, which is horribly wasteful; and JBOD, > which is just a fancy name for disk concatenation, and is even more > pointless than RAID 0. The exception seems to be the 3ware 7500 > series - which FreeBSD doesn't seem to support. I'd be happy to be > contradicted :) twe0: <3ware Storage Controller> port 0x8400-0x840f mem 0xf3800000-0xf3ffffff,0x f4000000-0xf400000f irq 10 at device 11.0 on pci0 twe0: 8 ports, Firmware FE7X 1.05.00.034, BIOS BE7X 1.08.00.038 twe1: <3ware Storage Controller> port 0x8000-0x800f mem 0xf2800000-0xf2ffffff,0x f3000000-0xf300000f irq 11 at device 12.0 on pci0 twe1: 8 ports, Firmware FE7X 1.05.00.034, BIOS BE7X 1.08.00.038 twed0: <RAID0, Normal> on twe0 twed0: 1526248MB (3125755904 sectors) twed1: <RAID0, Normal> on twe1 twed1: 1526248MB (3125755904 sectors) that's two TWE 7500-8 cards, each with 8 x 200GB drives. so far no problems. (except you need to partition them with disklabel as sysinstall can't handle the size..) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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